:root {
  color-scheme: light;
  background: #f5f7fa;
  --font-display: "Segoe UI Variable Display", "Segoe UI Variable", "Segoe UI", "Helvetica Neue", sans-serif;
  --font-body: "Segoe UI Variable Text", "Segoe UI Variable", "Segoe UI", "Helvetica Neue", sans-serif;
  --color-canvas: #f5f7fa;
  --color-surface-primary: #ffffff;
  --color-surface-secondary: #f1f3f6;
  --color-surface-tertiary: #edeff3;
  --color-stroke-subtle: rgba(0, 0, 0, 0.06);
  --color-stroke-default: rgba(0, 0, 0, 0.12);
  --color-accent-primary: #2563eb;
  --color-accent-hover: #1e4fd8;
  --color-accent-pressed: #1b44bc;
  --color-accent-tint: rgba(37, 99, 235, 0.12);
  --color-ink: #1b1f24;
  --color-ink-soft: #3f4b5d;
  --color-muted: #6b7280;
  --shadow-level-1: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-level-2: 0 6px 18px rgba(0, 0, 0, 0.08);
  --shadow-level-3: 0 12px 32px rgba(0, 0, 0, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --motion-duration-fast: 120ms;
  --motion-duration-medium: 200ms;
  --motion-duration-slow: 320ms;
  --motion-ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --motion-ease-emphasized: cubic-bezier(0.2, 0, 0, 1.2);
  --preview-scale: 1;
  --preview-aspect: 4 / 5;
  --preview-min-height: 320px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 12% 10%, rgba(37, 99, 235, 0.08), transparent 48%),
    radial-gradient(circle at 88% 12%, rgba(255, 198, 120, 0.12), transparent 45%),
    radial-gradient(circle at 70% 82%, rgba(104, 176, 255, 0.12), transparent 50%),
    var(--color-canvas);
  color: var(--color-ink);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.25;
  z-index: 0;
}

main,
section,
aside,
header {
  position: relative;
  z-index: 1;
}

h1,
h2,
h3,
p {
  margin: 0;
}

.workspace {
  max-width: 1440px;
  margin: 0 auto;
  padding: 32px 28px 72px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 22px;
  border-radius: var(--radius-xl);
  background: var(--color-surface-primary);
  border: 1px solid var(--color-stroke-subtle);
  box-shadow: var(--shadow-level-1);
}

.app-bar-left {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.app-identity {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.app-eyebrow {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-accent-primary);
}

.app-title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.app-status {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-lg);
  background: var(--color-surface-secondary);
  border: 1px solid var(--color-stroke-subtle);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-primary);
  box-shadow: 0 0 0 4px var(--color-accent-tint);
}

.status-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.status-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
}

.status-meta {
  font-size: 12px;
  color: var(--color-muted);
}

.app-bar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.status-message {
  font-size: 12px;
  color: var(--color-muted);
  min-height: 18px;
}

.file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-stroke-default);
  background: var(--color-surface-primary);
  color: var(--color-ink);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--motion-duration-fast) var(--motion-ease-standard),
    border-color var(--motion-duration-fast) var(--motion-ease-standard),
    box-shadow var(--motion-duration-fast) var(--motion-ease-standard),
    transform var(--motion-duration-fast) var(--motion-ease-standard);
  text-decoration: none;
}

button:hover,
.button:hover {
  border-color: var(--color-accent-hover);
  box-shadow: var(--shadow-level-1);
}

button:focus-visible,
.button:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

button:disabled,
.button:disabled {
  background: var(--color-surface-tertiary);
  color: var(--color-muted);
  cursor: not-allowed;
  box-shadow: none;
}

.button-primary {
  background: var(--color-accent-primary);
  color: #ffffff;
  border-color: transparent;
  box-shadow: var(--shadow-level-2);
}

.button-primary:hover {
  background: var(--color-accent-hover);
}

.button-primary:active {
  background: var(--color-accent-pressed);
}

.button-secondary {
  background: var(--color-surface-secondary);
}

input:not([type="checkbox"]):not([type="range"]),
select,
textarea {
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-stroke-default);
  padding: 10px 12px;
  font-family: inherit;
  background: var(--color-surface-primary);
  color: var(--color-ink);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.04);
}

select,
input[type="file"] {
  width: 100%;
}

input[type="range"] {
  accent-color: var(--color-accent-primary);
  padding: 0;
  border: none;
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-accent-primary);
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 1px;
}

textarea {
  width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  min-height: 130px;
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
  gap: 24px;
}

.rail,
.canvas {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel {
  background: var(--color-surface-primary);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  border: 1px solid var(--color-stroke-subtle);
  box-shadow: var(--shadow-level-1);
}

.panel--preview {
  border-color: rgba(37, 99, 235, 0.16);
  box-shadow: var(--shadow-level-2);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.panel h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
}

.panel h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-ink);
}

.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.rail-card {
  background: var(--color-surface-primary);
}

.preset-grid {
  display: grid;
  gap: 12px;
}

.preset-card {
  position: relative;
  display: block;
}

.preset-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.preset-card-body {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-stroke-subtle);
  background: var(--color-surface-primary);
  transition: border-color var(--motion-duration-fast) var(--motion-ease-standard),
    box-shadow var(--motion-duration-fast) var(--motion-ease-standard),
    transform var(--motion-duration-fast) var(--motion-ease-standard),
    background var(--motion-duration-fast) var(--motion-ease-standard);
}

.preset-card:hover .preset-card-body {
  border-color: var(--color-accent-hover);
  box-shadow: var(--shadow-level-1);
  transform: translateY(-1px);
}

.preset-card input:checked + .preset-card-body {
  border-color: var(--color-accent-primary);
  background: var(--color-accent-tint);
  box-shadow: var(--shadow-level-2);
}

.preset-card input:focus-visible + .preset-card-body {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

.preset-title {
  font-size: 14px;
  font-weight: 600;
}

.preset-desc {
  font-size: 12px;
  color: var(--color-muted);
}

.preset-select {
  display: none;
}

.rail-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 6px;
}

.metric-value {
  display: block;
  font-size: 20px;
  font-weight: 600;
  font-family: var(--font-display);
}

.metric-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--color-muted);
}

.preview {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.preview--compare {
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.preview-compare {
  position: relative;
  aspect-ratio: var(--preview-aspect);
  min-height: var(--preview-min-height);
  border: 1px solid var(--color-stroke-default);
  border-radius: var(--radius-lg);
  background: var(--color-surface-secondary);
  overflow: hidden;
}

.preview-compare:focus-within {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 4px;
}

.preview-layer {
  position: absolute;
  inset: 0;
}

.preview-layer--processed {
  clip-path: inset(0 0 0 var(--compare-position));
}

.preview-layer img {
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
  box-shadow: none;
  display: block;
  object-fit: contain;
  transform: scale(var(--preview-scale));
  transform-origin: top center;
  pointer-events: none;
}

.compare-handle {
  position: absolute;
  inset: 0;
  left: var(--compare-position);
  width: 2px;
  transform: translateX(-1px);
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.24), transparent);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.18);
  pointer-events: none;
}

.compare-handle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.2);
  box-shadow: var(--shadow-level-2);
  transform: translate(-50%, -50%);
}

.compare-slider {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: ew-resize;
}

.preview-legend {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-muted);
  padding: 0 4px;
}

.preview-badges {
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-stroke-subtle);
  background: var(--color-surface-secondary);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-ink-soft);
}

.badge--accent {
  background: var(--color-accent-tint);
  color: var(--color-accent-primary);
}

.preview-overlay {
  position: absolute;
  inset: 12px 12px auto 12px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  pointer-events: none;
}

.overlay-tag {
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--color-stroke-subtle);
  font-size: 11px;
  color: var(--color-ink-soft);
}

.control-row {
  display: grid;
  grid-template-columns: 120px 1fr 70px;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}

.control-row:last-child {
  margin-bottom: 0;
}

.control-row-wide {
  grid-template-columns: 140px 1fr 160px;
}

.control-row label {
  font-weight: 600;
  color: var(--color-ink-soft);
}

.dpi-readout {
  margin-top: 8px;
  font-size: 13px;
  color: var(--color-muted);
}

details.panel summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  list-style: none;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid transparent;
}

details.panel summary::marker {
  display: none;
}

details.panel summary::-webkit-details-marker {
  display: none;
}

details.panel summary::after {
  content: "+";
  font-weight: 600;
  color: var(--color-muted);
}

details.panel[open] summary {
  border-color: var(--color-stroke-subtle);
}

details.panel:not([open]) summary {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

details.panel[open] summary::after {
  content: "-";
}

.advanced-warning {
  margin: 8px 0 16px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  background: rgba(255, 180, 90, 0.12);
  border: 1px solid rgba(217, 121, 43, 0.25);
  color: #7a4b27;
  font-size: 13px;
  line-height: 1.4;
}

.metadata-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.metadata-grid label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: var(--color-ink-soft);
}

.xmp-block {
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--color-ink-soft);
}

.hint {
  color: var(--color-muted);
  font-size: 12px;
}

.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

#downloads,
#batch-log {
  list-style: none;
  padding-left: 0;
  margin: 12px 0 0;
}

#downloads li,
#batch-log li {
  margin-bottom: 6px;
}

#downloads a {
  color: var(--color-accent-primary);
  text-decoration: none;
  font-weight: 600;
}

.inspector {
  background: var(--color-surface-secondary);
  border-radius: var(--radius-xl);
  padding: 20px;
  border: 1px solid var(--color-stroke-subtle);
  box-shadow: var(--shadow-level-1);
}

.inspector-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.inspector-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.panel--wide {
  grid-column: span 2;
}

@media (min-width: 1400px) {
  :root {
    --preview-min-height: 360px;
  }
}

@media (max-width: 1200px) {
  .workspace-grid {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
  }
}

@media (max-width: 1100px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .panel--wide {
    grid-column: span 1;
  }
}

@media (max-width: 900px) {
  .app-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .app-bar-actions {
    justify-content: space-between;
  }

  .app-status {
    width: 100%;
  }
}

@media (max-width: 720px) {
  :root {
    --preview-min-height: 260px;
  }

  .workspace {
    padding: 24px 16px 56px;
  }

  .app-bar-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .app-bar-actions .button,
  .app-bar-actions button {
    width: 100%;
  }

  .control-row,
  .control-row-wide {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .preview {
    grid-template-columns: 1fr;
  }

  .metadata-grid {
    grid-template-columns: 1fr;
  }

  .preview-overlay {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .app-bar,
  .rail,
  .canvas,
  .inspector {
    animation: float-in 0.6s var(--motion-ease-standard) both;
  }

  .rail .panel:nth-child(1) {
    animation-delay: 0.05s;
  }

  .rail .panel:nth-child(2) {
    animation-delay: 0.1s;
  }

  .canvas .panel:nth-child(1) {
    animation-delay: 0.12s;
  }

  .canvas .panel:nth-child(2) {
    animation-delay: 0.18s;
  }

  .inspector {
    animation-delay: 0.2s;
  }
}

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}